{
  "manageEntity": {
    "action": "Save",
    "entityId": "2017262745",
    "entityType": "Track",
    "nonce": "0x2ec6873f73c0c99521798184e16297bfe3dda6d29005ce303e1e59c892d45463",
    "signature": "0x2ee68d173b720acbf1b35f14c6643ca469259374768df8e685d70a04ea3b21f20b995c312e86014f5a7b067ee7dec1d12a359df3b642bd116ea2624676a8fb261b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}