{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3387",
    "entityType": "User",
    "nonce": "0xc4266492d9ac22582ddee71bde66d5bae173954ad836fdda800e0e2362b77c77",
    "signature": "0x0aa50dc3c25763e3dcc5cdc58aebbc1c2341fb1638fd9a6be314c26c1050d74e64e87fd7ffb9c06ea0c5470dd7bcbf6e7461af6c1673d658c8ac74168f0d48681c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}