{
  "manageEntity": {
    "action": "Save",
    "entityId": "310164416",
    "entityType": "Track",
    "nonce": "0x4ca3275021dc28801d3ecafb9c6976ce535d9bbc897264fecb0774255024477b",
    "signature": "0xc65eca5390066b8ed31d5c127ae4a20f99ecbff99f4c7d094583282e5ad1f64f24005cda7c09c924ba3a6f6ea16992015506eb2a3b9c1d2b9176fd036cb0496f1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}