{
  "manageEntity": {
    "action": "Save",
    "entityId": "451997823",
    "entityType": "Track",
    "nonce": "0x613f3ac4dd49ad2e9f4cf07b8d28f8ed91d1c3c3c27b00addf2bf7ba44a22e66",
    "signature": "0x5b3225a286dd0db2611219ce6cc0ce39eb9e88d01b748594c535797f3d922f205efde16efa14ce788817b86a58141afd87b18a37a91088da2c2759a5e7a3d1651c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}