{
  "manageEntity": {
    "action": "Save",
    "entityId": "549918416",
    "entityType": "Track",
    "nonce": "0xcd1a589cf72d967e9037400d5c9407424d353c7d1fbecd18022c525122980b68",
    "signature": "0xd71b0ff8a28cce20cb8b5611ec20af62c8112368de166a84d84476fdafa04b487c4e89c8c64734fc86358496408303fce90a81ab9f81b847a01852a324cca1831c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}