{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831655445",
    "entityType": "Track",
    "nonce": "0x67949b8cadd6a7532b94091b83cf2a50d1361b5344777355620570164a3d064d",
    "signature": "0xcdf2c36046d29d9680b3e61a65200e400541f205c766a32caf0f39428ee7906f01f32e08db28509b84a2e171a67bc918bf44d18ee59a8d3df07eb9a81e6826c41c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}