{
  "manageEntity": {
    "action": "Save",
    "entityId": "761308786",
    "entityType": "Track",
    "nonce": "0x034b08c73ceebb266397d04b4d6ca87b66ff180729cd441798d7deedb6fd89d5",
    "signature": "0xe30a0b9b9f889091d37dbcbf7fa33816550a14d23261a178ea9e23ff248c959c3894bb9596014ed2c6c8c75e018a1ad2b7300f35f925787b1bdd3ece5de9bd351b",
    "signer": "0x375963f281CEdF4D9D180496F80A256D574daBa2",
    "userId": "981824750"
  }
}