{
  "manageEntity": {
    "action": "Save",
    "entityId": "328645",
    "entityType": "Track",
    "nonce": "0xfc0a1dd659b876cd4ebc3ee416b9dbb5144fa53946b79c3501d5e0ffbd8239d9",
    "signature": "0xf7358abbec47be3a401f7d90ca25878f5ad12de81c22b06081e114fd02e4814a2943ae96957a529a24a18967d2fa642dfe9f16c80c0fde17f541987feef4bdbf1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}