{
  "manageEntity": {
    "action": "Save",
    "entityId": "705100689",
    "entityType": "Track",
    "nonce": "0x17447d33a03d8dce9f48f5248950483e2770897e1320c322ef564fe4cedac3c0",
    "signature": "0xf86b7f8fa0c7e454000a2a0cadf05fc9c655f9a693fe46dd3e1d77f9e5ca1c340951aa1bf4dde706350abed3cba34f5dadfb09cbfebdbe69d2f67f47c8daf8411c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}