{
  "manageEntity": {
    "action": "Save",
    "entityId": "169357258",
    "entityType": "Track",
    "nonce": "0xb1f6b50396d71be2e1ebaf8b9e45b387a04e30e17e81e34950ec19c46fa51b6a",
    "signature": "0x6921d0ef3a30059ad2242d38fa3430929205c6224192214d9e8451689a3aa17d287461c157d88d123d71c7226ae740c0479662b8703ba58711e9a609548645681b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}