{
  "manageEntity": {
    "action": "Save",
    "entityId": "1008471125",
    "entityType": "Track",
    "nonce": "0x978535e04ca001b2fd6ca484bed8d20faca0aafc30d841d48821447f8ea420c0",
    "signature": "0xfabba80a217cb036d8f9fb32b71b8bd792d429dc61b67c81206314b4298df298640a983abce7db89e6032d0547c54c897326ae4f58b67dc267c79abfb1d4d5ce1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}