{
  "manageEntity": {
    "action": "Save",
    "entityId": "692271511",
    "entityType": "Track",
    "nonce": "0x368f601c907a34f87855db951df7a887c9435f85c74def1c0e2a28e8705c2899",
    "signature": "0x9b5730f588c802f949d385bcb77ac557a55e8e441839a7b4c0e2ed12785721655d96e646e6170626125545e92bdecc65731de373377e6b40e80cb4332554acd31c",
    "signer": "0x191B6Fd957f517929075f1e49822818e792FF015",
    "userId": "74652"
  }
}