{
  "manageEntity": {
    "action": "Save",
    "entityId": "126690",
    "entityType": "Track",
    "nonce": "0x85ebb0270202250928c7c42399f06a80d4989981903cf521ec05f650769c7d9b",
    "signature": "0xcf54f04da7138a65cb63c72d5429a5a4e79ffadcaf7b8af7c82993ad68dae7e71be2fe7080f62ac76864951c62d866487591c21ff80fdfac6d0fd49de7a5109d1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}