{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303474",
    "entityType": "User",
    "nonce": "0xd8b9e9d5e1b4719b2dc8768c6d02a573a934dc0958c8f6d70c1c794162cbbf17",
    "signature": "0xce3471e62edad152524b0a1c0d2e3b55a2d65a19a39bb6ed911ae956c9395bee0731dc908f836ac51a2037f38d1d2aab7d70de18175a9131b60666450f9c10291b",
    "signer": "0xE4c0c73a0c0CD7f65f1bE942f8127c8753aB89D9",
    "userId": "857284925"
  }
}