{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x940d57f65a33d2c9a22cb9233b9dc881b79c5b55479889e8528158e3e24a7132",
    "signature": "0x3869389fd4f841bccb4506fd60afd0aea257805fff2e6318ea81d4e49bc223285eeb9f00d5eefb2a8250776ab143388684e46ceb5917bc4f9810a4dedf4e50281c",
    "signer": "0xdC840A61774b0850116f9705f191a4c8E39C3905",
    "userId": "860375571"
  }
}