{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x10da30da4eb34ef45583994b15e122590880bd09f42b459c45d9a01b151ff505",
    "signature": "0x77641c4949427922d22162a35710a511ff9d421d518cc5e8cac75af41aca696b0d8d50eb5a6caa93193bc67fa4cf9aa81c30949bb57f366261cfcba64ae63cb41b",
    "signer": "0x621C1ffd4F2D9c750A93330767C1252dBa68Ec3A",
    "userId": "187371220"
  }
}