{
  "manageEntity": {
    "action": "Save",
    "entityId": "1122405494",
    "entityType": "Track",
    "nonce": "0xf1bd38677923f6f093fca34ac16a7aa0b81145890d33ce5b24a5c7d74359a18b",
    "signature": "0x9c50c5c7a42d56f724e4eeec02f2cb20407a54ffac9621ae122969423484d5d504971478a67758c744d48e58e150c3261e75cced5460071b91d87b33e830529f1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}