{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5fa6f1cae1f73e1b6ae6fcfe1dfbd80398fd197cbdf7b52132637cf2635e6616",
    "signature": "0x74ac42423154e022a46a3f366054ca0624a17ee1594b2ed5f36c9e9f688e968773d57433ad016cd886cf776ab755d556bf509c09c7eb71639fb0b014b15dfe401b",
    "signer": "0x22f321A4Fb7b09fb76CeC63E4Eeb7969459715ba",
    "userId": "969756963"
  }
}