{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "506671051",
    "entityType": "User",
    "nonce": "0x813c25e895b17bcf1e469c13d4848bbeb8cd52389be36bbcf07f81f4b9ab1278",
    "signature": "0xf00f3bbe3031b0207c34aa2e44454a8e8dda25810fd71a65da497fbddbf2d46e316289c04c71b6749339696fdf454a137d26e15fd2fade04809042036edecf601c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}