{
  "manageEntity": {
    "action": "Save",
    "entityId": "470500317",
    "entityType": "Track",
    "nonce": "0x8b7e6bd5d470b41837e6d2516bd3a861330c238554f7a7f2e3599dc1b094af0d",
    "signature": "0x1433286e5b4e58594f539b0d328eff9151022df9b1258e0e3dbd3235f4d0050674c9d928734ab7bc0cfd6d8314045fbbe93a97ebb5d9077e027afaf6831aae791c",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}