{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "53500",
    "entityType": "User",
    "nonce": "0x32730666dd29f468d3ed2f930fc70f53959f7239dc807ef5c2d7906bbc7abc43",
    "signature": "0x7f800ab9373affd6b6660c79e686e8cfa08d4c25536a0da93d940cd13b394ea307fbacb94471a8f3add4a976dadff22dac7f8b2623baadfcd54fdd066814e7cf1b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}