{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930338416",
    "entityType": "Track",
    "nonce": "0x96760c26257871b9ab125858fc9c76fb3f293a1c24c153d93eb51a7e4ce930ad",
    "signature": "0x54e63a453d3985eea0b7fcb2cd8e8ed6373eb88836436ca45ed8c780c3f5257845491fcc2ac7fc1c9135ccc8d480ccac78100104282d128b10cc9e2f972219001c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}