{
  "manageEntity": {
    "action": "Save",
    "entityId": "128147",
    "entityType": "Track",
    "nonce": "0x3c1dafb95b21a3c94c02f963e316de4898e967504b73d005938be5955d4eeaa5",
    "signature": "0xd3827442abf8d3f127756c25aa1519e49f6b9cd7c7d1fe5fbbe314ac196b3379497dbeded83a722b1b58bb9e88fd838ae4541503517c407d178ec58c259459a31b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}