{
  "manageEntity": {
    "action": "Save",
    "entityId": "1483602928",
    "entityType": "Track",
    "nonce": "0x4849b6b13b9ec0812b1f8b010be3f50d9a675065904887dfe4110477e1db6877",
    "signature": "0xb4902dcbeff6340a8834955bf6aee1aa0d202fe3ebccaeef5130c6c94367e3ee322d1d00966fded7c35e67cd59608c8d3ea8b92a2982b4949957e9fc2e808a591b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}