{
  "manageEntity": {
    "action": "Save",
    "entityId": "11703156",
    "entityType": "Track",
    "nonce": "1786639029819708321",
    "signature": "0x7379db0bb2d53c51bddb0349c39001e4fb357983e0dc4f930e5ec4fe15a869ef31c7f2f64d497a12401ecc44b977a5030d1168f538152b4c3e23a15b607a8daf1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}