{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111886",
    "entityType": "Track",
    "nonce": "0xc0919dc9f0dddd6666aa35004b3195faed4c2fb9622ca1b6220a45b94d2997de",
    "signature": "0x2cc97fe6dcc2fcecfd0477a69b884c4f2fc74792cc24ea2d732147a27fb6143329e9520fd0e16011ffab7c2c4d7c1ecd25a7c784e4a4cf29e2458bb3a94328ef1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}