{
  "manageEntity": {
    "action": "Save",
    "entityId": "1924011665",
    "entityType": "Track",
    "nonce": "0xf673b395a496c5a2f6e24c454f32496a1bf9265710cd3bd5aaac75df3faa2738",
    "signature": "0x209b5cc3b71abd4d3f1c3ce1d9b263df7429c068e5086e1b0c12b6f6eadfad054ddbc728ceacfa635e7c864e18944a3e720bcc872189a2c34cb1ecc6da6e2cda1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}