{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3d53bbce17bcae8ebdded5a5ec52b00e6a5c2f9c0793f881a48edb18dd096673",
    "signature": "0x5ad56559330d829f6450337b7bf53fc4d2a8e4d8cbb09fe888a78a61c4c4311140a03dc21fd64c9bc7ff99380c5f4cffc0572e72a90371cb581235ddbc3deee61b",
    "signer": "0x789F486f6C0BEcF3D1E3B3D82c61D526Fc7Edca6",
    "userId": "57299423"
  }
}