{
  "manageEntity": {
    "action": "Save",
    "entityId": "1923958504",
    "entityType": "Track",
    "nonce": "0xc49d114e1f36a06d4a1e35ab01178d6730770243e8760e25de83bc5ef72e6043",
    "signature": "0x0a34278bf154ee37dc2122fdd6332919ff40ca8f7eb83b9b7928cfd887884a5921b3f63c29e30fe2d24ad39c310bc3e3f4c4a418ac29525ac664406eab689fc11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}