{
  "manageEntity": {
    "action": "Save",
    "entityId": "673394",
    "entityType": "Track",
    "nonce": "0xae44dc0a9dc3ba136cd1efb78658a137a5892edd69a5408124f804738571b913",
    "signature": "0xcee660d0cc8117d18fe30b81a79a0e226c513f4ecba196ea66cb6254db80b0cf3ed03e666306a897cfcd3e0fd746c78fa81c6134ade524fd23a781ca4607c6ec1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}