{
  "manageEntity": {
    "action": "Save",
    "entityId": "1489596548",
    "entityType": "Track",
    "nonce": "0x709c2ab89b593dfcca29fd1df374a65ea9a57092e214db3d1ba615edce0c2a07",
    "signature": "0x65cdce024f3b014d627ef141c1dcd608157ede48a32ffd4a1e88f3b484bc9f14003b78f92d1931bd7e635a30a2c25ec37f4426986cece17f1ed8dd245fd4c07f1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}