{
  "manageEntity": {
    "action": "Save",
    "entityId": "1734587050",
    "entityType": "Track",
    "nonce": "0x189ccb3625ac7f61bf6bd98eb4b12baed4dc990ac043754f0dbba7ee369e430d",
    "signature": "0x283448196557a0a22f8487659086fbab9b3411d19e0eb2125fcee64c720ff6d063dc69a2134d7e22190e26a4da53eeb1c24f54f022726c2cf8b7c0099614e5c01b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}