{
  "manageEntity": {
    "action": "Save",
    "entityId": "999606279",
    "entityType": "Track",
    "nonce": "0x94e26c4b4c0c4f6dfa1622f78ce70a5eb9bc2213ff46d9bebf054044c04aa3a3",
    "signature": "0x6eb9b37e7d81ce0656aef6d3a7a9102a565383307b96010c58372f36bd6065f0146d3186d038af5194d225dd34850676bc05ebcffd540df9b00db742b4efece91b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}