{
  "manageEntity": {
    "action": "Save",
    "entityId": "573926273",
    "entityType": "Track",
    "nonce": "0x5c1f494b31c8b1f9b98a1edc91959538ccaea5c53cb6bb0e23f65509c23d2d84",
    "signature": "0x57f60e7a68c0ca9c27f25351cc4a70d18db9edff636b54bb6e0867c9e55d292e0082ea750d3655f219bfd4d57f48b8de03cccdc07f8b4a943b5ac319155caeae1c",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}