{
  "manageEntity": {
    "action": "Save",
    "entityId": "349927581",
    "entityType": "Track",
    "nonce": "0x2d8684aa820e441d809f927fb4f3c18cf6ef94d6bbc5c28d4261940821a2324f",
    "signature": "0xb52005ddbe5bf3dcc14cd3e82e4e626300431ed54452daf9c62d09c3aee9518016a05680184cd18373c6cd3cc1715b9a8ddca88ee7f365ee0e8b9af7a05e7df61b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}