{
  "manageEntity": {
    "action": "Save",
    "entityId": "271194283",
    "entityType": "Track",
    "nonce": "0x282595d1c7b3bae2dc5bbdb20089e094028c8e9ca6974e9a68deddaf385a5558",
    "signature": "0x7be3753b7e4421c646b375d893e49d30c1da1e3467a53aa6c63e7a3550534a8f7e5fcdacebdb5ec7aaf676c0b04ba040fa4609fbdc3cc5cba8fe21fbe6be78861c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}