{
  "manageEntity": {
    "action": "Save",
    "entityId": "596376",
    "entityType": "Track",
    "nonce": "0x2a142b6af825ed486a0267e6139da0be0f264a726b373d7a8f19bd3fa508e414",
    "signature": "0x675c0ce3c86adbad1c1cd3f85f72e4e4530c31ae257aac426adb7d733554a45861764833f2f6574b0decf9b196c9de5a11500c70926228c829dcc2d13f6a53e91c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}