{
  "manageEntity": {
    "action": "Save",
    "entityId": "2133102430",
    "entityType": "Track",
    "nonce": "0xdac0dc283b1566fc35ddaf803e749ced7677abb1228d18df7580a9fbbe2e5d74",
    "signature": "0x80a0fd9ccf675e9f91960b707b2b4981a57355f11d8c9293d56b309fe64f88a3644bb4f1bffd36c5231461b55ff3bb781072cd920d994d504a51fa37bb9c52e51c",
    "signer": "0x9FA029c6E43fD9781215e024e9ae5802602Ed2Db",
    "userId": "738673571"
  }
}