{
  "manageEntity": {
    "action": "Save",
    "entityId": "1713638648",
    "entityType": "Track",
    "nonce": "0x920a11c5e7ac83c2a6ac8f2fdd263797de2e710530bee466049c25a93463562f",
    "signature": "0x76b9b7bd4b89c23e01855a27ac99a74bb3591d2872690bb55b2e5370d0206e472aa32e005cbdfcbc1a4e7e994dff4421905f0a83c8c563aa3e1de0236053967c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}