{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x76ae42b03765f9e225ff01caa134995a831113cdfb32ef9d7f80c023db53289e",
    "signature": "0x53110e35ad42c8616edce20083db605a4b9701cdc16529356406f1964922e8497ed4e2f81fee72791bb34f061ea4c019c89a895103e7d32d4e607ecbf389dc4b1c",
    "signer": "0x72C3229e8a009963fcCB987460463895a2989d71",
    "userId": "109371348"
  }
}