{
  "manageEntity": {
    "action": "Save",
    "entityId": "659807634",
    "entityType": "Track",
    "nonce": "0xd3faac7c6652632674d9075de8b23fcf930c6b829d7732ebb8402992afd5a30a",
    "signature": "0x0a24292d75bd76b66c6b972c2be2201ad60035ee282628b2519cd2d937b40c5f7f9ba728fd5ffd90c4e508fb316bc938fa296819279fe7d028741d3b9cb84fd11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}