{
  "manageEntity": {
    "action": "Save",
    "entityId": "1872524171",
    "entityType": "Track",
    "nonce": "0xbf0b701b94f6620ebd92107734d5d3569cf3056893c1333f045b1cac01fe9a4f",
    "signature": "0xe2b81d1162055dbd3623fbd0aa29ab9778fbea6a6b769136ff1cf4ab8583200e37f9925db64945480cfe9ac3d4f651fbbd2ab56485e6899a7784b083768b48b51c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}