{
  "manageEntity": {
    "action": "Save",
    "entityId": "1602219485",
    "entityType": "Track",
    "nonce": "0x54f65a60aa9ec201178ee15c438117f170f3b76ccd3cfd9aa78ad526f29b66bd",
    "signature": "0x48bdec434405ef86934e9db4ddec566d54988d319a4e70fd15649984ebe43faa210296d7f3ef407161d51ad3dbfead3a373fc2398fa6267717e6568a27b8eb4e1c",
    "signer": "0x14d7618B82Da4e7176FDe32e4379943eCd69798D",
    "userId": "238125623"
  }
}