{
  "manageEntity": {
    "action": "Save",
    "entityId": "50366",
    "entityType": "Track",
    "nonce": "0xf30e3ef3b9baff65bc4f79793b72b2f09a8e909da8566d9df6668f8c09f8a61e",
    "signature": "0x258f86fbf5532632feed217496f3a83f46dce87ec6b55973e0c55ff5611967d9549966e28ff4c8e9d1e2c0a48b3cb636c69223c6c3d48f900a78501e6783414b1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}