{
  "manageEntity": {
    "action": "Save",
    "entityId": "418071391",
    "entityType": "Track",
    "nonce": "0x621aca5e23bd6f2d36d8cf3b01c6b8c37583e14773bde81004a3f590705c396f",
    "signature": "0x743cc85059d81edbe077cf2979740977c6f0c414154e2f97cdc931490c5e201b73447cb76359e654b90f6c0dde2e0868f646958d6c0295b0b013e5ac1037ba7e1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}