{
  "manageEntity": {
    "action": "Save",
    "entityId": "616889494",
    "entityType": "Track",
    "nonce": "0xee78fd7a9e738023b1fff9a3b70d3c9ed45e1b85f91ea3d321beee7ec80423d5",
    "signature": "0xa056e93eaa4bba1e16d0731e57f4ac413923bac057d4aaee18cb0c481b21a1b2102bed343f1f3d52cd28e9dd3fe65111f23af5186e7f028ed0414652fcfb2f1b1b",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}