{
  "manageEntity": {
    "action": "Save",
    "entityId": "71681840",
    "entityType": "Track",
    "nonce": "0xf57efd7587ea63d1851f339610c12a51cb0454e211a507e658d83b191622dc25",
    "signature": "0x82c29024818fc45054155b585f29e4d6b885ce06f32abf6224506ad7b0306a3d250976f397e2e517e8df82376f4fc62c92d07dcc498aae3043bb5a00dd8c22c81b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}