{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "138710",
    "entityType": "User",
    "nonce": "0xbccca0b15549fff08f49346826b2f997f5d815aa0f59af1313642f86d005d282",
    "signature": "0xbd18634491d333c47361a1451c340b25f81a40515a1a9b0fb2973a62698b60923f1cfebb6fa8997fa782ccbbfcc4972575e21a9208e0138a6723e4ca991273121b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}