{
  "manageEntity": {
    "action": "Save",
    "entityId": "264936324",
    "entityType": "Track",
    "nonce": "0x425974c238cfd52482d002428d5d8d8d69a91b6e78729efa18f78e4b90db1c50",
    "signature": "0xfaa16f2b4921f85855a2e1536088b0cf653b5ce6ad062291ee24b48bac7d7f4d214e51ceaae66e798d3f63594d38d07bbccde6a9d46731886a791176f6fe57031c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}