{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x7f15c88cf5d5dc899de75264c7ed266225bca122c6ae473fc426fb4eb554c7ce",
    "signature": "0xd2d5c8a5a11aad8be00e02d1e2b54d2d3a7780c04cfc66d8ca23b9f780f84a6c3cd5e75d60b24e292f41103b092ec38018f3f742c45592552d47bd563805f3f81b",
    "signer": "0xE8D6E5670A532CCA8099b7a222615B795D7E17CD",
    "userId": "617481694"
  }
}