{
  "manageEntity": {
    "action": "Save",
    "entityId": "121964273",
    "entityType": "Track",
    "nonce": "0x553babef2676e268f23d954c20167c26950c24413b2932c0335762eb40af10be",
    "signature": "0xb244b416d33fc64312c771011f4935532e76eaa83797d4ee41d142499d4bbd0a6c0fde50e50d5e0dbae8600fb28720afb4fbc06dd372a7289a94aef4cd7827f01b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}