{
  "manageEntity": {
    "action": "Save",
    "entityId": "1467218021",
    "entityType": "Track",
    "nonce": "1784258819334537077",
    "signature": "0x327b1ee74e7010a3c87e99d2d305fb04d72d3a9f5814385c1bfefa25e2aa39ce338f211bd0534197ba468deb4ace22ac79c3cbbfa48924c0b357abb31ff0c9e01b",
    "signer": "0x028b0571B497d65Faf19Aef806A797F17A18e19B",
    "userId": "143127"
  }
}