{
  "manageEntity": {
    "action": "Save",
    "entityId": "737348155",
    "entityType": "Track",
    "nonce": "0x9c7e339008a60fa64b6a74f4ed9b528d1995ff495baadddec8c3bad7cb760d15",
    "signature": "0x8920f0818297b60941bfaddae47e11702ce8414c9d9023208aefef261b949b460197b5d808f5990af072698978119a7f66c82234c082b51b2b011aa37cfb058c1c",
    "signer": "0xb0475f7218f2cAC4cAD833Dc763A6EF78a3501d6",
    "userId": "562088249"
  }
}