{
  "manageEntity": {
    "action": "Save",
    "entityId": "498367",
    "entityType": "Track",
    "nonce": "0x2ebe8797947b23b575fd528344c28eb22fe220e9ceaa4b2d8f6baa57c1302820",
    "signature": "0x8f5535c781f47f25ff46fe0387b5573f16defc90c5318fe12ffa61af9a28ce442627c6e4b2d2141f64d436f3e7aa265e4be7b38c00927d755891c950af524e471b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}