{
  "manageEntity": {
    "action": "Save",
    "entityId": "61949",
    "entityType": "Track",
    "nonce": "0x903236c1580f148d0bb3b3e8dae2d0841d02b845dba4535d0d52768274acbce7",
    "signature": "0x0b878ee651f17631cefceb483b8a247b294956c8172e13d6d719588baebc272e257b135941a067fa2789de185f284dba64fbd47111be7d2d97041575f77f931a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}