{
  "manageEntity": {
    "action": "Save",
    "entityId": "130625",
    "entityType": "Track",
    "nonce": "0x8c5460573aa7ae8adbe528e352426e1e51256950973f97ff9e15c55020513e62",
    "signature": "0xf307b4c3f21ad557e9ced9578c14d5611006535d16225a741bbdf16eb0949e5568a26db0d9a9c306ffd01936081b993ff7b1063b7c0d6b8d5f06782c1cc8aeb31c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}