{
  "manageEntity": {
    "action": "Save",
    "entityId": "1563990378",
    "entityType": "Track",
    "nonce": "0x3b6b07d02a4af6fbca219291549127b294b015c74b2033fc6fbe2e6cd39b7fe8",
    "signature": "0x199ca74d2abe7ec0c9e4b4660895b6fa89d69ba62a47e7103774cdbed76380687c50f335c5b2a5883e3ce571949f2f52655fd5868d6955d62781a54b266d764f1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}