{
  "manageEntity": {
    "action": "Save",
    "entityId": "1305766829",
    "entityType": "Track",
    "nonce": "1792468036053299802",
    "signature": "0xe74cde7a7cea6a03d6e33a33fb4143049462fb1088bb72c6a94dbfd815868a07166080d80f9bdfa84508dae840c1529ac08e72c9ba1015c7ab4c297181d6805e1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}