{
  "manageEntity": {
    "action": "Save",
    "entityId": "898069870",
    "entityType": "Track",
    "nonce": "0x44269b68450a7b8d5f2fd3abfc70818fed01270b49acf21b7ca6e9dc133cf554",
    "signature": "0xd75ed3c771e18b839315417a5d135d3c51cf2815d7f6f1cc764c18d01062e9680f63067ed1e8d96c1924e7ba86b27bff4f4eea33a6f761499810ba9616fc89291c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}