{
  "manageEntity": {
    "action": "Save",
    "entityId": "293910740",
    "entityType": "Track",
    "nonce": "0xce603aeb538a3d0c2b3cd297198958bb721da9faed2a73cd0ac916ab57c13cae",
    "signature": "0x62f4ab4e356eefe57fe59c915f6c02bf7725747688d62ff1fa4987d7d2ff3e8631ac63ff314503ffeb162caee62d30f4fd078fae5bf873478582c8b0a5f680f01b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}