{
  "manageEntity": {
    "action": "Save",
    "entityId": "1180478786",
    "entityType": "Track",
    "nonce": "0x8bf600cea58558e0e114bccfa39a018e29f492df2b3d95263f112597d7dd5c6d",
    "signature": "0x781de76bd21a230972a410dc6ba8b4ad41605e0abb6f4d7af6f3b81b07a1c3a5726e68aac02b581046d5b96cf6c2be1ffe78d9fef22f7e6d4d5b184d2e4e72e01b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}