{
  "manageEntity": {
    "action": "Save",
    "entityId": "163369806",
    "entityType": "Track",
    "nonce": "0x8177cc4ac094e350b43167a83f833017d12f8d95f5ce6c25294679922a1feaba",
    "signature": "0x0c01e7b1988aebdbd5b660178f3ee5aafe78d1bb1e0a1b0eaa761837a7d75998370b40f3d90fc64fc398868e0cfeb9afc369477e0575ef05607ec3a0b5dbad0d1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}