{
  "manageEntity": {
    "action": "Save",
    "entityId": "1337116631",
    "entityType": "Track",
    "nonce": "0xe585bf2a0a65d17271d2d990f845831d9b6fc346df0d1153395ff66108c10dee",
    "signature": "0x90b38330096dfba60b77adec8e70df9b0875983b04329835854db2b54aa31b9614d9b15bf1b3543a505b1d82001ba6b6ff84407db51387ca55746937fa3ac5f21c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}