{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "337206",
    "entityType": "User",
    "nonce": "0xc23c3642e868761954f8c6056ca3ac6569679d0a5c2f3871f23ee1bad4f4de90",
    "signature": "0x7b2b0a62d865115fb6b35cd3f3929437f9b730501f5e84a0f7a11492f13b817a731d722f3d8bcae6cf103c201e7fb7abbc6429b41a7b0f9dd3f244c9459bffb71b",
    "signer": "0x60503113D254c437C2ea4c18d70C8a9e20fD871f",
    "userId": "515269421"
  }
}