{
  "manageEntity": {
    "action": "Save",
    "entityId": "725355059",
    "entityType": "Track",
    "nonce": "0xa63d27839a7bbc1b0f034e8fc21f075035e792bae4b601ae6a35165ba7957986",
    "signature": "0xd5bce0d8b86b871d6e26773014dc84321ff3a2ca0ec0a41a6640d4fff96d22a30fcaa0076760531c0e9a83c30f0c59653362c96062c282f32250fe80d3097c751c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}