{
  "manageEntity": {
    "action": "Save",
    "entityId": "30062",
    "entityType": "Track",
    "nonce": "0x85649568471b7a14f1ed379f1e5f10e5af6e040108a6d8711563bd0a98621d7d",
    "signature": "0xbc9eafca4e0828f23c1b414a84e918aa2bed0203720d39b9ed948e9c5cb3956449e28df0ab753a632913b23322bb62e18e030148a59d0588580035f2c42366fc1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}