{
  "manageEntity": {
    "action": "Save",
    "entityId": "972418550",
    "entityType": "Track",
    "nonce": "0x597aa1ac05173005de92977c298c80bd33583eaeb11c63eb3d58bda73fb6f65f",
    "signature": "0x63f1b3cca581e30aad3bbf02da8bd9894e177e013255bee847d26dcc984309cc1763813d9ac4517353f517609820abc770341646d90fe4f3d7c07c22c121976d1c",
    "signer": "0x85F59ae09C50C39DC9CE1660B0D49082C751ce0B",
    "userId": "162449215"
  }
}