{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216734280",
    "entityType": "Track",
    "nonce": "0x631f1de04572fbea23cf20f354354e6816d6380863382c492f01fd2883edf116",
    "signature": "0xebd58f8809f3e742ee8445c1c1788e0022482e85161ce7693ea4040069db02a3607f84880015e028aebf03fbc127c48b524976d8a97c44ab10aae987c2ef902a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}