{
  "manageEntity": {
    "action": "Save",
    "entityId": "561119127",
    "entityType": "Track",
    "nonce": "0xf28a4266c7da266423421072c4ef04443ab5cadd41f838979cb896a78258dd11",
    "signature": "0x3e93590934eb223de3ba6c4c3eb4d41af28bfca64b1a65983325fc0b606135600a7827b5578caf2e330bbb531491b28849725c73b7e12914a9f927a77045d6231c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}