{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "771123224",
    "entityType": "User",
    "nonce": "0x1d1e7f05b57694ba556dc5ae9f905d5e1fff998448c31c6b327a10432d085943",
    "signature": "0x449fd1cb8be4116930484ca6bcea4811bcdc5290af59837bf9fdc0a0abd4775e26106021d72acd65450c25c0a82b9526040c96eebd494c960164e45e8f9c01341b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}