{
  "manageEntity": {
    "action": "Save",
    "entityId": "592641584",
    "entityType": "Track",
    "nonce": "0xb3fd682ec46aae63a961eae4b07b2524cb51e4b4fc882975732283a4b33de15b",
    "signature": "0x57fbc1a15c51d8c3fd5cca4173d5377b5ace9b3114c77cd496146cd28b2868b21cd219abcbc90b42108217d2989f389c29755d17b7657644fb1c6f17266982f51b",
    "signer": "0xc732abD40749026D35a8f4162a803dAAf665371e",
    "userId": "496394700"
  }
}