{
  "manageEntity": {
    "action": "Save",
    "entityId": "292484479",
    "entityType": "Track",
    "nonce": "0x8f6fed57e0c807020789435f58c39bfd36b3b4c23014ca2f84d307a80227ad4c",
    "signature": "0xe3a48a998ee82591dc0623418491facc39265d8f1975ad8834ef428abf037aca5458538f55ea7669579589d984ebb8a747c77339bd0b3859f5c8a403f1f1e10c1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}