{
  "manageEntity": {
    "action": "Save",
    "entityId": "552282272",
    "entityType": "Track",
    "nonce": "0x98d678c8a390e2a6df5dc9d251ba6e597adf7077b410fb1b86ae267bdceef308",
    "signature": "0x16dbde10e20b70d08173f11a4e78129705defaa39513a02a99d3ff72c247e5ff65b50b125b8dac33c542a03eeb19fc8a40cdf6a7bd4110063b4290b3d965702b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}