{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0xec75680ce8205bfac5f4d9e4618320e7c355c1c412a279ba4c483c5a52d13c42",
    "signature": "0x8f9c8779f1bcdc956e4c99c83b568819c756d0155ea1ba71c378ef4f3322069373edc08a621eb766a11648ba5c3563dd2bc9a558775c4e71b4b740b48bcac1a51c",
    "signer": "0x7094144C776594790B5E922D084562dB60549BD8",
    "userId": "602217700"
  }
}