{
  "manageEntity": {
    "action": "Save",
    "entityId": "1726967706",
    "entityType": "Track",
    "nonce": "0x937003e0c300e2a9528fc547382552b2e128b5959d694cb87adabeceda310a22",
    "signature": "0xa743226b578103f9aae5ff9bfa7cebcb91cb7d6f3bd54a03f0abb53a61073ec1294013302b890e73e8d790b5f0c649fd348e67dd92bbb0ea60e25ac18771fd251b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}