{
  "manageEntity": {
    "action": "Save",
    "entityId": "17624471",
    "entityType": "Track",
    "nonce": "0x4edfc27a355ba98e6bedc6e5b2383faa2ae945654f29211be994fe87347eb655",
    "signature": "0xfaa81175f9487121aa705328cabd88526025f43d45017606e317919c913f9695544400faf70e562a55f4ac3a7ee4a0110210d8a4a36e4d046a2de9956d6ad3a01c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}