{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1730737",
    "entityType": "User",
    "nonce": "0x04de9432e3b687474d500c2ce594a98feb4ebca6e3a9e8e2f4420bacac83efb2",
    "signature": "0xb240311aef669ee1201dcb1f94c8dd6f507d9c3f7d79e91eeef3b8c3beee70bb360aa4ef7ea8b4ce122cd63aac772bfe2847cbf3612036a55db6bfd0440e70731c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}