{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x397b02238a5cfaeace7e82b018b0f46cc878d279f80e11a8cf3201a3c88982ac",
    "signature": "0xa4266b5877ececbb51f11a56ac58a1fec7a594ce81d3468c137bbf739c64c16b44f4f0d95338cea4c9254e75862813f8afb0e24fb1e29cb1c04f3e9565b8cd5e1c",
    "signer": "0x9907b04E8C624FB09424afFedA15e216246d5703",
    "userId": "777443211"
  }
}