{
  "manageEntity": {
    "action": "Save",
    "entityId": "492022945",
    "entityType": "Track",
    "nonce": "0xb7afa70bb106030141d044ea527e63bb0f75d1792fdeb43f68671f8c0b6c32ff",
    "signature": "0x854f7be21c6268028a213e9e75332f25923d172d01193303455ba1bf4b5165d12e956344bc8d1d3ec771e8bdd1f33e92a2f7018fb0b788186116f6c58d560feb1c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}