{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "27721",
    "entityType": "User",
    "nonce": "0x5921be04133c2dd63e5355960050e118c58daa3fa1df78cebd33fd4af5521089",
    "signature": "0xfaf1ec5f10380a69cfb784efeaf032ec584940fb1051ea0c3a7e4ce9409c32156fb87cf0032240bc2d5ec4ac1d73cb9ceeb3512c63ae056d2ae2a98364ed1e971b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}