{
  "manageEntity": {
    "action": "Save",
    "entityId": "1571347185",
    "entityType": "Track",
    "nonce": "0x66907ef3454970b3573eb5102b5b4800a48d270ba6ab0895dfcd7c224e8819bd",
    "signature": "0x9b26565effe43700775b4e37274eeb71927fb1bc8267192199a7f34b0b1f25483d9d1558ed5cf61fdd4fcc435091b5881047d4478ac4c792b2145040ec56c47a1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}