{
  "manageEntity": {
    "action": "Save",
    "entityId": "1263180722",
    "entityType": "Track",
    "nonce": "0x3da2e3a4e9598ed73fe6572b180c82080486e2dda3945868cc1dd4d0461a5560",
    "signature": "0x575a7e252a403b1a805843ccbb39a7bb78961a9b8428312b5582226c6aea6645172378c3116f38c24df64bd4623ab5cdf1373e4df602ddc823d54cf21f4537d21b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}