{
  "manageEntity": {
    "action": "Save",
    "entityId": "184601557",
    "entityType": "Track",
    "nonce": "0x135aec4784d02f4f1e6ad4a1d5a724b4091d468d8865e7bb6ca9915f8686f2df",
    "signature": "0xa174d76370150dd5b5fd364ddc304f20b030436c5a7e82fc6430947176edc75a5d1c38caa3a9a64fd5cfa8217cd942919bcfb6535b74411c9d98b727efe327611c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}