{
  "manageEntity": {
    "action": "Save",
    "entityId": "798930",
    "entityType": "Track",
    "nonce": "0x3a332c031d31165c75d57f781b2faa2254d9d44a9226caf59ed2c2754fafcecf",
    "signature": "0x2e165d67f3081f9b1aac5dc1cffb7718944bc5f6abcc6ae50c295e93c5098b353b5eaefbfecdc9b2ba75491560ac265a90e06c72bb7e801a6acd0c1b7b8915a91c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}