{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "212500",
    "entityType": "User",
    "nonce": "0x58610e18615795f2a8bd7d671044dca77a74b57ce9d57dd39c65dab59d39c50a",
    "signature": "0x6f58320bbdd1c5f0067cac7a79f6f222743a290ca2d08d26a300c76526aeaa62555efc9f3934b69ffa45999c0663a79e2b40ba81f65396e9e8644f8ab9c37acd1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}