{
  "manageEntity": {
    "action": "Save",
    "entityId": "1613724380",
    "entityType": "Track",
    "nonce": "0xed80204bb5b15751c0bab4a5604b7a326ff45b7fe6cda5d24ad0222dd077aee7",
    "signature": "0xb1114de9c5bb5f1929b4d162a305cddfb38a41c7a25317769c92468803e90898353e19d4ad23b6c92bc87271238708d2529387935640f25bf936f84b591dece11c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}