{
  "manageEntity": {
    "action": "Save",
    "entityId": "586465046",
    "entityType": "Track",
    "nonce": "0x16e1c1b5220a5483bd60600be751d3671c1204b411d2e9d23f3bd2f0d93db9e1",
    "signature": "0xb0af3cf418066019ea2f55dec7e6a3d024c4933103b8352a8694fd84df72076474cf5b6fea5c77dbcf1cf4a4e5a2f4622318023eee2e5ff3870484da654fc2da1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}