{
  "manageEntity": {
    "action": "Save",
    "entityId": "586409",
    "entityType": "Track",
    "nonce": "0xaf65ff2c6980a29242bc33e07ff68746534c78f39e4615c1c70dcfb9ebdc9f33",
    "signature": "0x8b5e870e7b78aaad5a707bd6467f14ad0748e8831e5bc8be72dea049c3c9c84820738b563d97c65ba989d6fdbbf09efe2133398e0543a1081315e23137542f451c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}