{
  "manageEntity": {
    "action": "Save",
    "entityId": "4098390",
    "entityType": "Track",
    "nonce": "0x451403f4630f16bcb18bba8eb1ecaf35de2f8177a12d2d029621714321402ec3",
    "signature": "0xfaeb41230a38f74dfcf9bd860c4d54b1a763f2d5854157cbd11afc8b46cd932e56ba6a379e73083682e81db01ecdaac704ed33d563c3d36d9d954825da43a3981b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}