{
  "manageEntity": {
    "action": "Save",
    "entityId": "921151",
    "entityType": "Track",
    "nonce": "0x0dbc0b4e3426284dc72721138464b9c8f242705ade8592551920fd8b1f6a7e1a",
    "signature": "0x3989d21d5580c76ed2cfea121bf03fea04dbdca66c038aef75366cad82b307ce429f4136bf74f6f86e62c01393f2d0be87270dd3a8492f32d39762d1f40503171c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}