{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0xb4d0378d8e3598ecd4365d3620de6e55cd759f31ce56bcbec3bb4e8cb89316f8",
    "signature": "0xf909f2e150422c14526812951e5e28f9c5734e9b3ceb009942d2b4139c9d057929252295143026113507e0a3821ef5eedacbecd9b27d3e9288d18b41d0763e401c",
    "signer": "0x866CB73184a8420C302e3850B610761F882C4DDE",
    "userId": "166428182"
  }
}