{
  "manageEntity": {
    "action": "Save",
    "entityId": "208895711",
    "entityType": "Track",
    "nonce": "0xd47824b18214e1e3967d50d57773aadeb47085613f5cffa0aed98464ca9172a2",
    "signature": "0xa598dfe2e5147a6a4210a788dd96c858b827c222877f7a99cac1e3b419bc728b6b4d2c8d520b53949c26041c4dc8b1769644e0b9a67ed53ae2eca42b1bef2d141b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}