{
  "manageEntity": {
    "action": "Save",
    "entityId": "954502901",
    "entityType": "Track",
    "nonce": "0x141136719afe93ba52dedded2cc04e08d278999a565cc47991c2e3d43d0f0361",
    "signature": "0xc6f2896e27aa2d8ded930f4c84e6c09dd107e906d3df54e23af0218dd81586815acd5158d2f5e67eb5298054e60367339a12a3e9f57abe51e30ba19ab2d1a8871b",
    "signer": "0xC7f1C5c105933bBdAC0c8A3219204f23AD4f3320",
    "userId": "381638009"
  }
}