{
  "manageEntity": {
    "action": "Save",
    "entityId": "1000605753",
    "entityType": "Track",
    "nonce": "0x124d7b968d7c9d4681935d5431258833eec8245845a04660d43ad6cd59e5ddad",
    "signature": "0x4279c624fff2c7b1d0866acb3ffd51f1e9351d30f68830e75ba8a69af8da41160be39cf838c9f1639336712785fa12b0716763f1149b5e55c5576ef9441d92071b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}