{
  "manageEntity": {
    "action": "Save",
    "entityId": "622853645",
    "entityType": "Track",
    "nonce": "0x7784a53431f85deef4ad522f0c93fa3d449382afc5eeaa67347d9ef16592a34f",
    "signature": "0x06e876920b1c6d03fb4bf5e628b0a09e591d5f32927beea07906a2c469cd844376d1272c6d396b3d04d3ae42f59fad7c36a2b4f08628e59fe36f107d5a9b62c31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}