{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "637372504",
    "entityType": "User",
    "nonce": "0x4a53c8bf9cca783e69cfbc5c542603bdcb4e0e30f8607855dfb5152290b3e26c",
    "signature": "0xa16c909b57d6bd0936cb5d74161ed91616a6f3fbf32b70f86e490d5e0e60808c6bb92cb86666b594c18b53cb8133a5bd9423a3c08ec53074b04d77dc3b71f9a11b",
    "signer": "0x6c0771bDf79a6A5766991c79F529eBb83F3a668c",
    "userId": "40009880"
  }
}