{
  "manageEntity": {
    "action": "Save",
    "entityId": "265966140",
    "entityType": "Track",
    "nonce": "0xc07db7fd3d866e86c6d583e23567f014ee6708374049469be36ca32844e12f33",
    "signature": "0x46bc903bb64a4f6b8417298e4c023df584099b85071d82caeed7bb0f478e89133667ffd46c80094ea5119044e5098221b13fd3c27cd305b09e0568427d7f315e1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}