{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "391346264",
    "entityType": "User",
    "nonce": "0x652889727ccebfa58d2397f21d2f73bf3daca5e4de0af33d34a17e7999079620",
    "signature": "0x57fc890c5350660b93303be571aa3ccd7867ad538b8cad8e63d3a441260f4f4d3dea11128f9096d16c3bade8118fa435f8a0dbe29ec1b83118af93146e6792741b",
    "signer": "0x21C9b5409a415E4F0923C5378a82C85B8dd3467f",
    "userId": "575912766"
  }
}