{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "754628254",
    "entityType": "User",
    "nonce": "0x5fc952fc7881772c10116eab2ebca8ba41232af24376f049de28dc884f099488",
    "signature": "0x503ba720fcddb91203db530bd0549d523a8b73cb31aba73ac7446ec0db738a7961423de6001e2c012d38953a74d3cfc92bac91fbb8a0390cab508b08041baaf21c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}