{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "334323",
    "entityType": "User",
    "nonce": "0x20f144aee5c587585b05faef826a7bf343b6c347c3da60f0f66bd7a6d712a622",
    "signature": "0xde3a23c0533d1bf43539e9d74916daa9c994645f4cae3a2ac4b5fc8bbbad4adb55c3fdf8d051a1c7c0ab78ac935ba9fc15b1427ac3d06b7e434a192d0b5585f81c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}