{
  "manageEntity": {
    "action": "Save",
    "entityId": "335902261",
    "entityType": "Track",
    "nonce": "0xc6158faae93fed527a9323135e3f713795eaba75888784e828377c71083a4094",
    "signature": "0x810c5204e95cb8067aad6e0f6135670d9b39e46a2599fb426a53e513d300c2b07591db14ad9a1125ff0b254f1f6e643eeb2ea4b2b0d2b89f8383404bc83202721b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}