{
  "manageEntity": {
    "action": "Save",
    "entityId": "988514",
    "entityType": "Track",
    "nonce": "0x6a619123b9ea25b6c0b2786f2fcb68d92f912b3a0964acc9a4954b235a30b010",
    "signature": "0xa4b3d3ffb4f72660ca00d6e01135e60c456a93060ebb673c2fb78cc60b5fdac104ce6b33e8d5541bc340d4103164e91b9644d653fa68374a167f382b049330db1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}