{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210084910",
    "entityType": "Track",
    "nonce": "0xb1b73f6f2737be42aa4b987d83d9d4ae585fecf3ea71b98539d2cb7c10e39e4b",
    "signature": "0x011262b2ad4a7f2d83921aec930278f8214e1154f7bee8504bd1e44ec6d4115b29bb0dc58fb9dc2015a61e18126f475898e0f23fb3436913439a51136e62a1891c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}