{
  "manageEntity": {
    "action": "Save",
    "entityId": "338213",
    "entityType": "Track",
    "nonce": "0x2b6ae36b870707e2ef468c28f60bc76b643bd752d49f902cd54d193372ca818a",
    "signature": "0x2b48699fd85de40f47847850fb6ff1b717bf16c3adb91c97a8304f598bbe34326b74318772f78b43915c4fca05722b2af06817fe9e449f5cecea9ef5089046a01c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}