{
  "manageEntity": {
    "action": "Save",
    "entityId": "169560281",
    "entityType": "Track",
    "nonce": "0xa9d8b53c1644d5a7b60c4c14be6da1807ae6b6c7638eafba8256141f18aad81c",
    "signature": "0xdb3f524d697a34e50c5bec50a75079e4f47ec8766b86171465d07b01bf3cb6967cac8bfa507baf9c0c15aa4222a7c622ebf45882eec126aa2fca46db6c74ec2e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}