{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x10991a30cab740f2e5e72645a4952db92d9b8cdce5d39c81b38a3a5151e04925",
    "signature": "0xcf4ac820fbd8d4462ccc4841948e71b48488d359b49106ba784c2af5801a6d80052a0ce29956c3933593482cac65b366018893451cb5294890dc0f3c8bf21ea91c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}