{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "738673571",
    "entityType": "User",
    "nonce": "0x0f7a062c12e40084977d16c57262a927d4e2867103118e8047e53ab84ff85db5",
    "signature": "0x73771c4af8ea29b2e11d7cfba787079972009c28a29aec70c4338cb482414744237422712762e07c26f158d3366fc38bb8586883664191ec9cb890341910f66d1b",
    "signer": "0xFe4E972E3ec8D8d619816F5644f74CB5bA1B01b1",
    "userId": "219239808"
  }
}