{
  "manageEntity": {
    "action": "Save",
    "entityId": "1379332778",
    "entityType": "Track",
    "nonce": "0x2875754e607ee3358e45040dd1d1bc33cd209ea3c6e3888e3b304aa5c2f3a849",
    "signature": "0xd35ee1af452ab4e85e3fdf8951bcbfa17042967c9c73f2e015bd8ab186b656094db45ce8863e56a7c72350f90e2c21b766cffe548f525cff8e0f2b7f554add0d1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}