{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843",
    "entityType": "User",
    "nonce": "0xc60001a781984d4204e8be75c2ee9fc09e5650c4810a1637a742ecba2648d2a6",
    "signature": "0xb576a6b4c33c6d64dcc77caf5697ff0eb2a07d3d37c93442b2c746c21249210266086c731c3f8d2cb9fa675a14b8dd613c50060816685d17921a146ab819351c1b",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}