{
  "manageEntity": {
    "action": "Save",
    "entityId": "962633064",
    "entityType": "Track",
    "nonce": "0xbeb893e59d281525ac6b0b1c6318db3fa6e1ca9e7a1f52af3feae9fc09e1a7ac",
    "signature": "0x91e4298054ca8770632a10460392885c97259844bb571b68151bca83b5c2cbcb3bd33c95fcbde6fc482220c0b20dc38b53b243e7e9a67fbc5c53d60f27f519af1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}