{
  "manageEntity": {
    "action": "Save",
    "entityId": "618485495",
    "entityType": "Track",
    "nonce": "0xd34fff8d67ad24e61a5e2df065893555d57a3cf3c8ca30bb9f968797be4ec96b",
    "signature": "0x828cb34194fe7c707174c2f2b4c8b10ef4def36f63cc2216c33fb3a91c6d6d8b50e56c1c23bf354508c8fbe39fa78a026274fa37f9943e11ef4edd129f59333f1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}