{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6445",
    "entityType": "User",
    "nonce": "0x011f86f33a87059d6bc3508259e54483956a92b3ea84bb3699b3c59af40e0e1f",
    "signature": "0x2d492de38a0fb14ee7f9e0e19d23d36aa2e4eb76193201960dc66ece993a7b302c294d2c9bbf452b7541e8c7dc4cbf152594a59dc2dcbebdfba44e6d58670e8d1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}