{
  "manageEntity": {
    "action": "Save",
    "entityId": "1392751759",
    "entityType": "Track",
    "nonce": "0x9f6848633198363831bfe145bd318e2f784faff83120ddebcbde71c794a4ff95",
    "signature": "0x88e4cd3ab49bee1cc05ef72db1fe10434f443946a19b9d44462dea47ef2b590737768389787c47edd14003bd1f39d48c7c95aa3b140eb9ffdb06155ffc61f5b21b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}