{
  "manageEntity": {
    "action": "Save",
    "entityId": "662335622",
    "entityType": "Track",
    "nonce": "0xa2ce541a910bf72bf18096395136ba03b1b95f734a4cd8ab66c4ce38c2e5738f",
    "signature": "0x755043de8ea75df57385840beaf8c04292ced922a90c41381df74b6de8c5c07644993438cd13f83c3e1c46f66e78d6c9ebb4e880726dd94c10a1882b8bea09ca1b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}