{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375624787",
    "entityType": "Track",
    "nonce": "0x2ba06b1fbc8ab3f6545880992a2d93cc5dbef3dd8186722d56227206d2057b1f",
    "signature": "0x6f63a7960f965378b3e76c749745b02d1e89ea1d8ac2fa5022369033c06c2a22458edcb584543ceaccd5a4b39faa743c8cb058b1df22c819e7f2b8877cd2170c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}