{
  "manageEntity": {
    "action": "Save",
    "entityId": "361061949",
    "entityType": "Track",
    "nonce": "0xf415303833975eafcafe09d19d31ba95d1faf287b06c3b1f1e80e8b01c4a6064",
    "signature": "0xb3da4cc0f6ba44587f59248abb941b0587f6ccda00549ca1096dbfbba933d0a00db828fc7a25de9a2073e7de88c2cae9c3579ed5a0c20a0daae13f084ff416191b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}