{
  "manageEntity": {
    "action": "Save",
    "entityId": "2073694676",
    "entityType": "Track",
    "nonce": "0x88e358fc1de28acc2362661fc2f679852f0024c2bc107d07379494edebb0c442",
    "signature": "0xb37c463053027b22deba9c0b12053fa30e08bd094a835d2624a8cf06de3c77ee777918f00057fb21fa10efff9b684cf020dbff9b90627e0005f657f2d6931b971b",
    "signer": "0xC7B16Eee24C03712c67aa884907593f4df23db87",
    "userId": "56534466"
  }
}