{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980352810",
    "entityType": "Track",
    "nonce": "0xc1b9160467002912000137e896762a0264e14bf7df32412fb56677f9d42b0d18",
    "signature": "0xfcbac84557a905a70003ecb23d5f185b8f81b6e117ca0e9247a0f0ca6f60e59c4446ccc1bf3cc98ced34f8b54d0b8acbd6d4616262880c9951ef1104e3d60b3b1c",
    "signer": "0x8FF85C5AA450a88f13FbD5170e24E2a3eFF32518",
    "userId": "311829956"
  }
}