{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787702613",
    "entityType": "Track",
    "nonce": "0x844e33db5d515d64ffda56e449f3eeaca2fa89af0c0a1801fd6abf72d1cf5ec0",
    "signature": "0x4b7bff901a4f6e66f9bc0c55cd616be1a94a0100928aadcd5e7a7c1945f8e5b40837e9ed2784a38f1bfae2738d40659fb3b2b4b5e4f908b3dade9f84c5f5c6981c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}