{
  "manageEntity": {
    "action": "Save",
    "entityId": "327587",
    "entityType": "Track",
    "nonce": "0x8d9b623fb2869fb1aea32793a925e5e58f34a1f73a32bafb4eb82cec751ceb44",
    "signature": "0x7269c22c3bc32a8825ac38153aee08bdba9ee40d922e620423bd69091fcfd1f51636c8cda13d780a5ea315d4fc11361d35b4880c9d79ed6b64521e64029c270e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}