{
  "manageEntity": {
    "action": "Save",
    "entityId": "1272205816",
    "entityType": "Track",
    "nonce": "0xda06810ef5fe62d3ed552547368f5f436bc20c72dab0bf4fa7d8740303e3dbd1",
    "signature": "0x78883bd0befb3e13b4c20f8f962891b7aa3d4983c7eebb71ebc19878acf0351f53d4c4fd6f95a2d111a200d36c132f850c1c520f41c3622ded7fe2487145f1a81b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}