{
  "manageEntity": {
    "action": "Save",
    "entityId": "1652533149",
    "entityType": "Track",
    "nonce": "0x1a2111f9d5888557b454a8e364ec75da8bc94b03dd88ff86387af4dc64881bc7",
    "signature": "0x84fcef1be47918cbd3ae8840edc02babf4b77bf3e2fdd27c0e8b7b87e65938942b089cdcf7e3467708c495e90c7eb90a3e14ad4466ae0f60ed1b316c308c06a81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}