{
  "manageEntity": {
    "action": "Save",
    "entityId": "903142494",
    "entityType": "Track",
    "nonce": "0x193d18a9c77a4ffca9d737a68668b960269d44ef62cef538622ab601ff9c4054",
    "signature": "0x5f8d0fe983a2bd29fc2916c6249e0be9f4d00d6cbb9577ad002ac4f856efe3d771f7996d3cb62b28b53714633ef1238e449606de9749a45c0c9ac94c8a9353881b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}