{
  "manageEntity": {
    "action": "Save",
    "entityId": "9158889",
    "entityType": "Track",
    "nonce": "0x295d7bf9a564bd6e93c8e0da027e2bcb5262019144ccffc3fbf100591440373c",
    "signature": "0x9d65d94f87eabda354e1624a8a10e87263ce88045bef6e88e05da5c8690cc91a3d5d23af8843f9c98fa3378a2a35049302d1c9bf1fca5110bdc949f3e0e36cc71b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}