{
  "manageEntity": {
    "action": "Save",
    "entityId": "322073",
    "entityType": "Track",
    "nonce": "0x488b9351cf0bae88a4c3656c0b8701db2f29ae2f65ad6782fcb84a456d1789e4",
    "signature": "0x7a830ef0ac0b49183aa2d07c6e5fd7920d3db7969da8d275c05b58de1b293fd4639141b0aa9e76eee9e3b513f9f8397ebcebbf2c8178fdb5be5872dce086c8a11c",
    "signer": "0xe733E935A493aDB1626DcaFadba29521329a894a",
    "userId": "204311649"
  }
}