{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938327965",
    "entityType": "Track",
    "nonce": "0xab727fd9b356c78e3ee2232d4dd7dde323f0f6ef777071cd7327079ef7212f3a",
    "signature": "0x6aa534cc4d5dbbdf0610ced3554b82fcde5e828f8dffd53ba803c5e04b5f4b7207623b4930850d6272aa634a2e848161fa5d7cc78407aef01794675860614eca1b",
    "signer": "0x39Eaf8c888898004b5F1ba4d3237370010eD378f",
    "userId": "71668"
  }
}