{
  "manageEntity": {
    "action": "Save",
    "entityId": "252073",
    "entityType": "Track",
    "nonce": "0x5d005116963d48b778bc40fb226cb74bfd748c5bafb1b7fe80ce3aa2c0442801",
    "signature": "0x90f2e1931f353b846e395e487ff4d21c934c3ade07f63936527ea794ba13c1a03fe8636d586f79d51dc0c9c7e4a2b90f3fde766f3748d7ca4d6d3ed6201de5141b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}