{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951443517",
    "entityType": "Track",
    "nonce": "0x81eeafa0a1f0035f69bab3a2f232faf41bc77a505f4c80187694fb1caffb9f88",
    "signature": "0xa6f7ebeded25fbed066786e6c8e64b503ccc30be261b3c5b64a613c6d65aa9e04ffdd91ab922846bd73e09727c799ccc744ad49c349d3f9e556041e26ec36aad1c",
    "signer": "0xB60638A16dB9440769D68556a99A3D24d3F7F26F",
    "userId": "137494"
  }
}