{
  "manageEntity": {
    "action": "Save",
    "entityId": "185436",
    "entityType": "Track",
    "nonce": "0x61c25628a5780d6d66e23a139080dddbdd3858a0eb9bc71c3347d946c2977d66",
    "signature": "0x2741ca5d45a672cbc061c14243cdb751a3301a48aca1ab0d1852a326814dd8454c2551b7e02197945584a8832f0bf689f4bb3587543d1b8b7ba3a3d97c4f011f1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}