{
  "manageEntity": {
    "action": "Save",
    "entityId": "1596976443",
    "entityType": "Track",
    "nonce": "0xa30d6237cbbf0d6e247cc4c38fc6616531038a6ba306cc0d4e907d2899495ac1",
    "signature": "0x6d1133d293fbdf85bc437f8acb3d9b0d130c825d76b5716dcf2a72e246896f3e41dd2fb2b381908aac031fccf9e815d168a4b3404c6abf0cfbedf39e26c6c46f1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}