{
  "manageEntity": {
    "action": "Save",
    "entityId": "840943270",
    "entityType": "Track",
    "nonce": "0xe31dd095480394c3ae47df63d5aeab80e3a5e674c0cf86d4f0c54b14889135e3",
    "signature": "0xed8cd1be5a5b0150f9bec1ff2155c9b0b0c2d32e5c6e2d85e824fdd8ac217d733ceb5a80e3c779ec834cd034ffacb5206f1b36cbcc0427e4e42e0d7fbd4a31341b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}