{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x551ca5cbbb8dd5a566f414f5aa0cc630f88c883a337d9e94a011dfa9910cd645",
    "signature": "0xbd0d9da5dcd838d4ad01d4db3d56283ef5b7d1900e1561ba13b939971defbae71838d79f5b26ad50f86b0455edc789e5d5af75766fd073f21315ba5e9b1cf0191b",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}