{
  "manageEntity": {
    "action": "Save",
    "entityId": "843961145",
    "entityType": "Track",
    "nonce": "0x832b6fdff671f793ba09fc24d515edf4740eda2e5771ec1f258cb4c581aee679",
    "signature": "0x1e8648295cff603384aae7cab8c9cc6e702d0239f91ddd5c877ac2c1e40ec2c16742dc4dd485fa65e18c34dc3f78a4ed19967f875a42abe64f48d1631bddded01b",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}