{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "506789556",
    "entityType": "User",
    "nonce": "0x99826a092047774e1d4bbf43b62162cfaca7906ad9f51ee22ec17c0fc0f4b734",
    "signature": "0xf08f8b8e28ec8e1cfb36bc6844b70addb4865f27c2593d643e3b0a2282bda56e5babb278b67ecc6420dec968c1e5cdb43a40f4ca9af1a9e5bdf1dafd0227ec981c",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}