{
  "manageEntity": {
    "action": "Save",
    "entityId": "37211",
    "entityType": "Track",
    "nonce": "0x7e414c9d2d88ad0ccf8a91f8aefc5ad022a479c4589138f8f884399e2e8c83d2",
    "signature": "0x970f257c191fa562775580f6e63e3eb288a303bbf0d8d5ff2734c9a1e8fa46ca50f80e749078605e3722736628d7bc0637b705cdf7926aee4381087099a26c7a1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}