{
  "manageEntity": {
    "action": "Save",
    "entityId": "591156155",
    "entityType": "Track",
    "nonce": "0x9852b23d5e05b497a56b099329209cc5599ae128216f60f9830bfda36ef4e31b",
    "signature": "0x28323725634c5b01c3b30b870ca573227b776b8e888835a8c99645fc70df583574cb30e76e3b142584f01ff5f549e380fa94527dffcd009eb283dd1c4b46cba41c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}