{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xda26e77468439e9109cbafe7fac45966a2cce5a81c62c983ddf99579e826c6bf",
    "signature": "0x32f30076952b3f7816e01dc63eea7cc2f6f30e75cea7400ce01b9ef44cde041d259f2aeb7e84f1e525832868b68ad475b8ad01a3c9d1ba93ade8d143681b58ff1c",
    "signer": "0x81f60DEAd0cdA833Ad17fe7Ddd37b36E62630205",
    "userId": "132087202"
  }
}