{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021211619",
    "entityType": "Track",
    "nonce": "0x4410171d50fd19ba7824956684c24ba32ae5a10dfe2e7656f52bf166037cbf3e",
    "signature": "0xc2d2871488fdd4c8932a6afc38ec1ff416d2d37f43ccb2f59f07a45fcaa7977c77b8c9f38b65fa303dae06764a05361d7aec32632987bbfbb761ef6776ad0cfd1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}