{
  "manageEntity": {
    "action": "Save",
    "entityId": "1728593347",
    "entityType": "Track",
    "nonce": "0x23bb07cae026e4aa3b3d59d2463c38190b5e20bc76d95292963abf74acbb3a8f",
    "signature": "0x3a729d5cc0f204e802ee71dd032a7918e047e123525b2ff615efb1ef8675950533b7b81f37dbb6bf93a34e09a3e26e79f669d0bbfd225f8cf93a2ed62c7bab871b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}