{
  "manageEntity": {
    "action": "Save",
    "entityId": "702162539",
    "entityType": "Track",
    "nonce": "0xe40f9308311fd720cf85a1e2338dfda588a55dbf2c5a99800478a55602445f05",
    "signature": "0x12c8868f6c28ac1c571fab2b534f60966597798e7e036959e4ada56899e42913045547b2168b6295b2d3c545fd074fe0658065c205cacf6aaacab78c746a146d1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}