{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138803229",
    "entityType": "Track",
    "nonce": "0x7ae83771fe20b7831f1d0d58b2d80c1d17d7898130f1ad90526a343ecb378aa1",
    "signature": "0x498dd334eb9aaf172e4f6a903cc22d8ebb1e3ac47a0a34e9cbf8c73629e1d12e32a2e229ffa7d2f10fdf20e339166f89ccca790c0273aac1eff0ec13dd3d46fa1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}