{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "507199",
    "entityType": "User",
    "nonce": "0x110d96b5e10cbad38079412dc0a174d0251fabc64fafb6c95d683c71bf39fa11",
    "signature": "0x2da452f26f143c9d617443fa3a6ab2c2de9c5780e9846d6f6a9e19a82f5478c457cdad644f7fb229ac2912c325dccbed072a7dd2c29fc3e5ec4aa9a14220abb41b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}