{
  "manageEntity": {
    "action": "Save",
    "entityId": "1888248349",
    "entityType": "Track",
    "nonce": "0x78c2589ea40b88f17c294b6ab061a346788339668c15e708b705bc8ae8a2501b",
    "signature": "0x01594d5cf18aa91ecb066cd336b874cf15c93b3bc656d565d2422d821921da7039756b3f3bd7c1d3c89e72568a7473dfeb7c0b5a793f706cd3ca06836dd040451b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}