{
  "manageEntity": {
    "action": "Save",
    "entityId": "1223836395",
    "entityType": "Track",
    "nonce": "0x8fcf0b9e2d92285b96fa27ace68038301ea5eefc4151879d6a9fdd454367243e",
    "signature": "0x9077ff44acb9622fcd0ee96a1bbe8316eeb3818b023f8e875110de81837a1a0c75930ba50e20f2e991ed1dfde8881b0468136e2bebf459ee0fea26000abc64d71b",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}