{
  "manageEntity": {
    "action": "Save",
    "entityId": "825451847",
    "entityType": "Track",
    "nonce": "0x6c2938d7551bda54bd6d770adf3af0a9e4b6a105fb6bdbb466f019b9967166fd",
    "signature": "0x919144a14a582356b60c3917066840b3ac12e3a2906807cdfc2ae14f8c1b3c264b68ba0cf9cc35dec517a34d5118cb936fd988dd438f5423453282e3234169471c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}