{
  "manageEntity": {
    "action": "Save",
    "entityId": "1965430288",
    "entityType": "Track",
    "nonce": "0xdc1e2a6d53faa4e61120dba52a8938ee1c09b7dc640c8c764b48502188a83369",
    "signature": "0x3cf34adc57fe07a26e57a77cda14b5c62341d4effdcdc4c0f55437153a09ce6a47e8126a61ef03afd0e36337f4fe9c83fb21eae4006030e27e659979053e94c11c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}