{
  "manageEntity": {
    "action": "Save",
    "entityId": "1013562503",
    "entityType": "Track",
    "nonce": "0xcf02117d07fdc34a6b357ede7a1c773da709a38aad21f50c91748c56da326a82",
    "signature": "0x0a0d38292cf15b366d1afbbbbf2b42061d3e7aa5efea29c67b8e9da3876b94801410e2785cce2a339552740ffc2a1918f85faf3588d36c6f013b232f96bd2b161b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}