{
  "manageEntity": {
    "action": "Save",
    "entityId": "522597585",
    "entityType": "Track",
    "nonce": "0x0734c49becebc5b8203d5a63bca9aa490480c5f68575bbb6eb9b5a40c33374c1",
    "signature": "0x33e297fa767ca95f10b0f3754a73691eed4f7010b25da7985303d2e97ead73bb71960e592ed2bc420462ad7e5dbd0f315012c3a3646f79862b7049170ba2f52d1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}