{
  "manageEntity": {
    "action": "Save",
    "entityId": "116238393",
    "entityType": "Track",
    "nonce": "0x0ed41aef624c571ffe8990a1f3c69fe6e89bdffbaf1fa92e360029b1ed9c9840",
    "signature": "0x1eb979262606aa1c5144832797c41a5588c4884f6c2d7977cfa490ea296c37f14b8a4e6ffd0fe140b2a380f47b9d6c6a6c3899b486e60800c6eb226d437a106c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}