{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931244227",
    "entityType": "Track",
    "nonce": "0xa891b3b1c9e73d8335bda78f4834180b92c8af6cb76ff7ab2a5efaeb97f10877",
    "signature": "0x5305cc049d571669e615f19cc7ca2772a7057e976b154ac06ecd32b9c1beec254bf8047546a87b42e147e62600e4d96cc16ff7d04f8fcbbf605bb4b26876a6d61b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}