{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300244455",
    "entityType": "User",
    "nonce": "0x1564ede31739e56f8255f483d7acc5ffd721cc904fd43fa7ce2896794ac02edd",
    "signature": "0xb471ae262d45b21430275838c5a3926aef6185e63dfe310ae5907e9082a0ffda36cea1f6d0ac1b1f869d64ee5e2e3ad20999bf6bd07d42e2cb7508aae19ed0141b",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}