{
  "manageEntity": {
    "action": "Save",
    "entityId": "315689428",
    "entityType": "Track",
    "nonce": "0x785ce1047012b75a52693425b41a323206ecc4a16a143ce6142058e4997e9b66",
    "signature": "0xadd615c5b1cd161938be36c545c404c04c18a45d99bbee3239925cc9569e35240aa1f95840e80ed45202ae73d315ff14d0ecef661663a5b71d5b319eab56db3a1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}