{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21285244",
    "entityType": "User",
    "nonce": "0x9b941217bb0662846894d67c501bff04a9be78c58d50e7412b4cc287b7fa21e9",
    "signature": "0x10064a76ec82a85330eb119ecf77cee233dd86d2f556b21780687e10440f607210dee04a576fefc497e91f8ea6c84ef7f6dc28b6d1b943141d3917268b9af6321b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}