{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x01e2785fa925be19f00d83fa5401982d3b2556d8e12fee0c47302bbf65736264",
    "signature": "0xac581b8a4395643ef605f5bde4e0181bb67747ed2a6f0ff826b873b1456fe61f5dc7819726ce9f0547b50c43aee9b254935b7f204c8bb1ccd159c4e19835d69b1c",
    "signer": "0x509EF9C2a6431299770117e05f294Be4e5D591A8",
    "userId": "275210993"
  }
}