{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833017864",
    "entityType": "Track",
    "nonce": "0x69b5a6c50872b061138e1ddd5fa43d96b2809461cc2fa1390ac04203f8e2e99d",
    "signature": "0xa8eebf4270703e50b2d6a4e842d926e4c5518fe56d0921fd89e33db6cb4d2186257918d3b8b895d67153dcd5377c66c7ddd2c6b0b31991dfa1ccf84fee6137b21c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}