{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "81899771",
    "entityType": "User",
    "nonce": "0xbb24b2a3b4d1bf86e20ad0148c2397c6445286952877aa7cbd895a4be6886efd",
    "signature": "0xc6521a10a1be5ceb3a6c483bc4982f2d65ff8de5d3a07aee3e7f6f5aa466b0b42c92d5c4814930cc2489a3fad0002fa0f69da62d28ae5b88015c0d7352d138611b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}