{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16971",
    "entityType": "User",
    "nonce": "0xd60f72041e39b5ee2646274e368447764c0e589eade506d25d0466aa3df3ffdb",
    "signature": "0xa898159287dce72c91a7a89878ef02808eea2dd9e611ba44483654976fee44f924a7f743e4eaad4f219f73febf35ca1957869ede0f427b7ce61585a5bcb37eba1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}