{
  "manageEntity": {
    "action": "Save",
    "entityId": "1080584490",
    "entityType": "Track",
    "nonce": "0x3d76035e936dc5c114e5732e0e9ec3baf08296eb8f84de8e1199143688bcacec",
    "signature": "0x513b930ecdcea76384117d0b4cc1ef4a7779f32a2131d4c958739384338d9d9a23efa951abad9a85708e389c43cee28e9413fc39ac3c4b368fe4f92531bb93ca1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}