{
  "manageEntity": {
    "action": "Save",
    "entityId": "250158",
    "entityType": "Track",
    "nonce": "0xbbe3d1e68dd6988ba5a116383bb019c24b9ef0733e76fde119fe9d0e8a491c14",
    "signature": "0x3b9eea1aa8ef5b434eb241d85ffdaefe6b8e0a6bdc3af2bdfe3f18cf56f1a57715f961d7971f2814e2773d6bb63cf64596a48578c3ffd24f46b7bc94bbe752b21b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}