{
  "manageEntity": {
    "action": "Save",
    "entityId": "697414",
    "entityType": "Track",
    "nonce": "0x4f4338eb1e64eb73472813633c39f6d46fc2e3d475ca53ecbda36e7f7d3f4a82",
    "signature": "0x8162152945b22b1a2acb48ca541c2bb1bfb5850d22323d9eadadfba0c4515e400dbee06737ee566d706fdfb3ae609d66f2a3d9139ff157b11e2afbe72bce02691c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}