{
  "manageEntity": {
    "action": "Save",
    "entityId": "217201",
    "entityType": "Track",
    "nonce": "0xa1c8bee6cc3f2dcd87de0742abcbe477e15344a879a6adc75afebb9a4f4cc14f",
    "signature": "0x14a917bba66deb5a6741a7d19328f2572241399cf8e668697012a3a8c686a3db20ef77d74ff5ad367cb241d5c87c09668d858950b0ce4d4b57e2302469d566931b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}