{
  "manageEntity": {
    "action": "Save",
    "entityId": "246236460",
    "entityType": "Track",
    "nonce": "0x635ccb72a0ec888c4b731aaf924d2f70b6ed97fd42f57e13caf20f75a27e316f",
    "signature": "0xcce83612a4132a95aaaa3d422cd2101250e11b418070edb1f7210ac42ff8ac2f00e62fae781fb50d5481be0d8ad1adf2bab9e7638e323ee8787d1421df0c8c801c",
    "signer": "0xd3581B11b990309D3270B36Aa62A5283E0cB1e5B",
    "userId": "762070701"
  }
}