{
  "manageEntity": {
    "action": "Save",
    "entityId": "187671",
    "entityType": "Track",
    "nonce": "0xebe23204c3033bca48177b6aa04e5730e7e8a806bd7a491fe9556d60f7b2613e",
    "signature": "0x1bd7dda29f0fff433750ca498a098fd2543bdda1ff4df90a388c4eea66b14f5b01598a4b01a921a33c76bc4f77e49e118024429e4738aa41c69696326fe098bc1c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}