{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x58681776dce8ba4847a2fda588d897396f5be43b54effbd71b9b0b116beffb91",
    "signature": "0x4c72aebcdc9bf0c0f67e4713400dd39fdae9e16bf00f415f9e14f9f38352e9d074ffc3e6824a70881f2fecca843f3ed917aa9aff0a118fe829c90160bea5a0a71c",
    "signer": "0xA78Bb948Abf642E3c239b1050053d913a7D0840B",
    "userId": "439961721"
  }
}