{
  "manageEntity": {
    "action": "Save",
    "entityId": "1916381067",
    "entityType": "Track",
    "nonce": "0x9d73909a392d0a1f77d5ff5d9e1f50c1574cb2775d38ff7dda7bf57b9acbc0c4",
    "signature": "0xeb35c6a50d77937f0a3b78b82babf28c6de80df1831e5ebcc77369e80104940871ce3cdab93fd01dd4c5f02e97f5c4cb19cd89ed70ea556477bcecfbc09167301b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}