{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307831",
    "entityType": "User",
    "nonce": "0x4e24877e1f4c6e08606337882f53f390a5db03d01603833370900f9ad70ed754",
    "signature": "0xf4d9e27402ab880d23616ba322d61fb982219ac2aff60c1b6a31a660a198f2833a0aea733c22d8dad94ae2b99beb620f30e93920c612b28ff370b46ae07456b11c",
    "signer": "0xE4c0c73a0c0CD7f65f1bE942f8127c8753aB89D9",
    "userId": "857284925"
  }
}