{
  "manageEntity": {
    "action": "Save",
    "entityId": "733005508",
    "entityType": "Track",
    "nonce": "0x197acd89e84cfd78adff8e4f5cfd6423a81536c1896cf433653337b9b0513693",
    "signature": "0x07d13f28df58a8321582d9d85614334ce1928e4ed9ff2c4f37784b3ca306d5ac0befe20f456ce3fd49558a2301f8084e798b6e2278fc9b5655b39d67e3fa6b741c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}