{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "776139",
    "entityType": "User",
    "nonce": "0xffdefcf96808a3de2ca54e2454b90b6ec24f3f7ed357f764c855b3fbe1c2a3a0",
    "signature": "0xfd3e1b406a76496ef73eb1c06f2bd1f2e83a68a2d77a584c085208246c1811ab5d1bff10ce3d59b5866cadbcd012a509035ab13200bceb8e4ef8d02a70e28f501c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}