{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "377610060",
    "entityType": "User",
    "nonce": "0x748e6066ace7cb9032f6444a7017416b2618b1ce732137b09e6800f60e4b0c9f",
    "signature": "0x07c76478f394517f4fedf302c6367fc56cba712fc9e69d0c0bf198125a599f777634fc6d62d7324ae95eb96ae284501a27b7d80bb5694a1d68094a149079b32c1b",
    "signer": "0x5FB1dF0c125C1F3cdda251a598Cb878a0A390F18",
    "userId": "25189733"
  }
}