{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699058295",
    "entityType": "Track",
    "nonce": "0x8fa9177d9500bf0e195a833d50ce7ff2d1b8a99a79d9a52e1a59dc6459932822",
    "signature": "0x77b0aa4346300db92624b6745b807c6066813291b6e29912b2db4eb4ac64025b4592ecdd6a17716604d697f5a8331b68683a88c2631a799bbb335e663108b1781b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}